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1. |
Solve the system of equations by using substitution. 
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A. |
(3, 7) |
B. |
(5, 11) |
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C. |
(4, 9) |
D. |
(1, 3) |
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Hint |
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2. |
Use the substitution method to solve m - n = 7 and 3m + 2n = 6. |
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A. |
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B. |
(-5, 2) |
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C. |
(4, -3) |
D. |
(-3, -10) |
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Hint |
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3. |
Solve the system of equations. 
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A. |
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B. |
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C. |
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D. |
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Hint |
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4. |
The equations y = -0.38x + 56.6 and y = 0.38x + 43.4 represent the percent of men and women, respectively, receiving bachelor's degrees, where x is the number of years since 1968. In approximately what year did the same percent of men and women receive bachelor's degrees? |
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A. |
1990 |
B. |
1985 |
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C. |
1995 |
D. |
1980 |
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Hint |
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5. |
Solve the system of equations. –2x + 3y = 7
4x – 6y = 8. |
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A. |
y = –22, x = 29.5 |
B. |
y = –22, x = –31 |
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C. |
y = –22, x = –36.5 |
D. |
no solution |
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Hint |
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